Learn about a man who may have known more about Osama bin Laden than any other person in America.

FRONTLINE rebroadcasts the extraordinary saga of FBI special agent John O’Neill titled "The Man Who Knew."

As the bureau’s top counterterrorism agent, O’Neill — who investigated the bombings of the U.S. embassies in Africa and the attack on the USS Cole — joined then national security counterterrorism co-coordinator Richard Clarke in believing that the United States should kill Osama bin Laden before Al Qaeda launched a devastating attack on America.

FRONTLINE: The Man Who Knew: Preview

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